<template>
  <div>
    <!--面包屑-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片-->
    <el-card class="box-card">
      <el-alert title="添加商品信息" type="info" center show-icon></el-alert>
      <!--步骤条-->
      <el-steps :active="activeIndex - 0" align-center finish-status="success">
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!--form表单-->
      <el-form :model="goodInfoForm" :rules="goodInfoRules" ref="goodInfoRef"
               class="demo-ruleForm" :label-position="'top'" label-width="100px">
        <!--Tabs标签页-->
        <el-tabs v-model="activeIndex" :tab-position="'left'"
                 :before-leave="beforeTabLeave" @tab-click="tabClicked">
          <el-tab-pane name="0" label="基本信息">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="goodInfoForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="goodInfoForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="goodInfoForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="goodInfoForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader v-model="goodInfoForm.goods_cat" :options="cateList"
                :props="{...selectCatePropsConfig}"
                @change="selectCateChange">
              </el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane name="1" label="商品参数">
            <el-form-item :label="item.attr_name"
                          v-for="item in manyTableData"
                          :key="item.attr_id">
              <!--复选框组-->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border :label="item2" v-for="(item2,i) in item.attr_vals" :key="i"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane name="2" label="商品属性">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane name="3" label="商品图片">
            <el-upload
              action="http://127.0.0.1:8888/api/private/v1/upload"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture" :headers="headerObj"
              :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane name="4" label="商品内容">
            <!--富文本编辑器-->
            <quill-editor
              ref="myQuillEditor"
              v-model="goodInfoForm.goods_introduce"/>
            <!--添加商品按钮-->
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!---->
    <!---->
    <!---->
    <!--图片预览-->
    <el-dialog
      title="图片预览"
      :visible.sync="previewVisible"
      width="50%">
      <span>这是一段信息</span>
      <img class="img" :src="previewPath" alt="预览图片">
    </el-dialog>
  </div>
</template>

<script>
// 深拷贝
import _ from 'lodash'

export default {
  data: function () {
    return {
      // 步骤条索引
      activeIndex: '0',
      // 基本信息
      goodInfoForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        // 图片数组
        pics: [],
        // 富文本中填写的商品详情描述
        goods_introduce: '',
        attrs: []
      },
      // 基本信息验证
      goodInfoRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      // 商品列表数据
      cateList: [],
      // props配置
      selectCatePropsConfig: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 动态参数列表
      manyTableData: [],
      // 静态参数列表
      onlyTableData: [],
      // 上传图片的请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 预览图片
      previewPath: '',
      // 监听显示、隐藏预览图片
      previewVisible: false
    }
  },
  created: function () {
    this.getCateList()
  },
  methods: {
    // 获取商品列表数据
    getCateList: async function () {
      var { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        this.$message.error('获取商品列表数据失败')
      }
      this.cateList = res.data
    },
    // 监听选择商品改变
    selectCateChange: function (value) {
      // 级联选择器不是三级清空
      if (this.goodInfoForm.goods_cat.length !== 3) {
        this.goodInfoForm.goods_cat = ''
        return
      }
      this.goodInfoForm.goods_cat = value
    },
    // 监听切换tab
    beforeTabLeave: function (activeName, oldActiveName) {
      // oldActiveName切换后的tab的name值
      if (oldActiveName === '0' && this.goodInfoForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类！')
        return false
      }
    },
    // 获取动态参数列表
    tabClicked: async function () {
      if (this.activeIndex === '1') {
        var { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'many' }
        })
        if (res.meta.status !== 200) {
          this.$message.error('获取动态参数列表失败！')
        }
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(',')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        var { data: onlyDataRes } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'only' }
        })
        if (onlyDataRes.meta.status !== 200) {
          this.$message.error('获取静态参数列表失败！')
        }
        this.onlyTableData = onlyDataRes.data
      }
    },
    // 图片预览
    handlePreview(file) {
      this.previewPath = ''
      this.previewVisible = true
      this.previewPath = file.response.data.url
    },
    // 删除图片
    handleRemove(file) {
      var filePath = file.response.data.tmp_path
      var index = this.goodInfoForm.pics.findIndex(item => item.pic === filePath)
      this.goodInfoForm.pics.splice(index, 1)
    },
    // 文件上传成功时的钩子
    handleSuccess: function (response) {
      const picInfo = { pic: response.data.tmp_path }
      this.goodInfoForm.pics.push(picInfo)
    },
    // 添加商品
    add: function () {
      this.$refs.goodInfoRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必要的标签！')
        }
        // 对this.goodInfoForm进行深拷贝
        const form = _.cloneDeep(this.goodInfoForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyTableData.forEach(item => {
          form.attrs.push({ attr_id: item.attr_id, attr_value: item.attr_vals.join(',') })
        })
        // 处理静态属性
        this.onlyTableData.forEach(item => {
          form.attrs.push({ attr_id: item.attr_id, attr_value: item.attr_vals })
        })
        //  执行添加的业务逻辑
        var { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败！')
        }
        this.$message.success('添加商品成功！')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId: function () {
      if (this.goodInfoForm.goods_cat.length === 3) {
        return this.goodInfoForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
  .el-steps{
    margin-top: 25px;
    margin-bottom: 25px;
  }
  .el-checkbox{
    margin: 0 10px;
  }
  .img{
    width: 100%;
    height: 100%;
  }
  .btnAdd{
    margin-top: 15px;
  }
</style>
